两种C末端侧胰凝乳蛋白酶肌钙蛋白T亚片段对肌动球蛋白超沉淀的Ca2+敏感性和ATP酶活性的影响。
Effect of two C-terminal side chymotryptic troponin T subfragments on the Ca2+ sensitivity of superprecipitation and ATPase activities of actomyosin.
作者信息
Ohtsuki I, Yamamoto K, Hashimoto K
出版信息
J Biochem. 1981 Jul;90(1):259-61. doi: 10.1093/oxfordjournals.jbchem.a133459.
Abstract
The troponin T2 (m.w. 13,000) subfragment showed a Ca2+ sensitizing action on the superprecipitation and ATPase activities of actomyosin in the presence of tropomyosin, troponin I, and troponin C. On the other hand, troponin T2 beta (m.w. 11,000), the properties of which were similar to those of troponin T2 alpha except for the lower affinity for tropomyosin, did not show the Ca2+ sensitizing action.
摘要
肌钙蛋白T2（分子量13,000）亚片段在原肌球蛋白、肌钙蛋白I和肌钙蛋白C存在的情况下，对肌动球蛋白的超沉淀和ATP酶活性表现出Ca2+ 致敏作用。另一方面，肌钙蛋白T2β（分子量11,000），其性质与肌钙蛋白T2α相似，只是对原肌球蛋白的亲和力较低，并未表现出Ca2+ 致敏作用。
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